On the standardization of packed cell volume determination.
D001774:Blood Chemical Analysis; D002498:Centrifugation; D004739:England; D005858:Germany; D006400:Hematocrit / Q000266:history*; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D013548:Sweden; D014481:United States